MANA NIC driver

[whu]

Summary

MANA is the new network adapter from Microsoft which will be available in Azure public cloud. It provides SRIOV NIC as virtual function to guest OS running on Hyper-V.

The code can be divided into two major parts. Gdma_main.c is the one to bring up the hardware board and drives all underlying hardware queue infrastructure. Mana_en.c contains all main ethernet driver code.

[gbe]

Thanks for contributing this driver. Is possible to test it already on Hyper-V, or Azure?

[whu]

In D31150#701307, @gbe wrote:

Thanks for contributing this driver. Is possible to test it already on Hyper-V, or Azure?

The hardware will be publicly available in Azure only. But I don't know when. The code has been tested internally.

[whu]

Update the review, incorporate some review comments from Dexuan.

• Rename mana_trc_dbg and likes to mana_dbg, etc.
• Fixed some comments.

[decui_microsoft.com]

In D31150#712854, @whu wrote:

Update the review, incorporate some review comments from Dexuan.

• Rename mana_trc_dbg and likes to mana_dbg, etc.
• Fixed some comments.

Thanks, Wei! I had a quick look at the updated version and it looks good to me.

[dougm]

sys/dev/mana/gdma_util.h

178

Initializing this to x, rather than 0, means that it's computing not log2(x) but x+log2(x). Is this deliberate?